Effect of Alteration of Antioxidant by UV Treatment on the Dielectric Strength of BOPP Capacitor Film

The effect of altered products of the antioxidant by UV irradiation on dielectric breakdown strength of metallized biaxially-oriented polypropylene (BOPP) capacitor film was studied. Results from Weibull statistical analysis show that an optimal UV exposure level of ~3.4 J/cm2 (200-400 nm) increases the breakdown strength at 5% probability by ~20%. As indicated by UV spectroscopic analysis, the antioxidant in BOPP was consumed almost entirely to form 2,6-di-tert-butyl-p-benzoquinone (2,6-DTB-PBQ). Density functional theory computations indicate that this compound is electronegative, which probably accounts for the increased dielectric strength.

[1]  P. Kebarle,et al.  Electron affinity of SF6 and perfluoromethylcyclohexane. The unusual kinetics of electron transfer reactions A−+B=A+B−, where A=SF6 or perfluorinated cyclo‐alkanes , 1985 .

[2]  Richard M. Martin.  Electronic Structure: Frontmatter , 2004 .

[3]  Masahiro Ehara,et al.  Excited and ionized states of p-benzoquinone and its anion radical: SAC-CI theoretical study , 2002 .

[4]  H. Mark,et al.  Encyclopedia of polymer science and engineering , 1985 .

[5]  Nicholas Quirke,et al.  Molecular modeling of electron trapping in polymer insulators , 2000 .

[6]  N. Quirke,et al.  The Calculation of the Electron Affinity of Atoms and Molecules , 1999 .

[7]  J. Kovarova,et al.  Antioxidants and stabilizers—LXXV. Effect of 2,6-ditert.-butyl-4-methylphenol on the photooxidation of high-impact polystyrene☆ , 1980 .

[8]  R. Holroyd.  Electron attachment to p-benzoquinone and photodetachment from benzoquinone anion in nonpolar solvents. [Pulse radiolysis followed by second pulse from tunable dye laser occurring after a delay of 10 to 200. mu. s] , 1982 .

[9]  R. Martin,et al.  Electronic Structure: Basic Theory and Practical Methods , 2004 .

[10]  V. Komolprasert,et al.  Effects of gamma irradiation on polyethylene, polypropylene, and polystyrene. , 2004 .

[11]  K. Hedberg,et al.  Reinvestigation of the molecular structure of gaseous p‐benzoquinone by electron diffraction , 1973 .

[12]  J. B. Lambert,et al.  Organic Structural Spectroscopy , 1998 .

[13]  J. Connolly,et al.  High energy density capacitor development at ABB Power T&D , 1998, ICSD'98. Proceedings of the 1998 IEEE 6th International Conference on Conduction and Breakdown in Solid Dielectrics (Cat. No.98CH36132).

[14]  Mihai Popescu,et al.  Physics of Solid Dielectrics , 1984 .

[15]  W. Simons.  The Sadtler handbook of ultraviolet spectra , 1979 .

[16]  D. Sánchez-Portal,et al.  The SIESTA method for ab initio order-N materials simulation , 2001, cond-mat/0111138.

[17]  W. G. Chadband.  Electrical Degradation and Breakdown in Polymers , 1992 .

[18]  J. Vogt,et al.  Breakdown behavior of oil-impregnated polypropylene as dielectric in film capacitors , 1998 .

[19]  B. Delley.  Vibrations and dissociation of molecules in strong electric fields: N2, NACl, H2O and SF6 , 1998 .

[20]  J. Pospíšil.  Transformations of phenolic antioxidants and the role of their products in the long-term properties of polyolefins , 1980 .

[21]  Nicholas Quirke,et al.  Molecular modeling of electron traps in polymer insulators: Chemical defects and impurities , 2001 .

[22]  B. Milosavljevic,et al.  ANTIOXIDANT ACTION IN IRRADIATED POLYPROPYLENE STUDIED BY ULTRAVIOLET SPECTROSCOPY , 1999 .

[23]  A. Bruchet,et al.  Investigation of low mass oligomers and polymer additives from plastics. Part II: Application to polyolefin soxhlet extracts , 1991 .